Doorknob



Jan. 7, 1.930 H. L. EVANS 1,742,952

DOORKNOB I Filed ualch 17. 1927 'il v Patented Jan. 7, 1930 UNITED STATES PATENT OFFICE HARRY L. EVANS, OIE ROCHESTER, MINNESOTA DOORKNOB Application filed March 17, 1927.

structed and adapted to have a lateral wedg-.

ing movement as it is moved in or out, its function being to fasten the knob and spindle together.

In the accompanying drawings Fig. l is a view in perspective;

Fig. 2 is a longitudinal sectional view;

Fig. 3 is a section on the line 3 3 looking in the direction of the arrows;

Fig. 4 shows the parts separated in perspective; and

Fig. 5 is a view of a slight modification.

A, represents a spindle. This is preferably provided with longitudinal grooves l 2o on its several sides, and has threads 2 at the intervening edges.

One of the grooves 1 is deepened to form an inclined way 7 to receive the inclined guide 8 of the key 9. This guide 8 substantially fits the way 7, and causes the key t o move radially in and out of the groove, as 1t is moved longitudinally therein. The function of this key is to fasten the knob to the spindle, which it is in the act of doing` in the construction shown in Figs. 2 and 3.

The knob 4 is preferably hollow, and its hub is provided with grooves 5 to receive the edges of the spindle, with intermediate threads 6 by which it may be screwed up a suitable distance on the spindle. These grooves 5 also form key seats for the setting of the key. Y

The key 9 is forced -radially in one of the grooves 5 in the hub of the knob simultaneously with its outer movement, and the key is moved outwardly and held by the screw 10, turning in a threaded hole 11 and abutting against the end of the spindle as clearly shown in Fig. 2. AThe tighter the screw is turned, the more rigid the fastening formed between the knob and the spindle.

To remove the knob, the screw 10 is turned in the reverse direction, and the key 9 is slid inwardly and toward the axial center of the SerialV No. 176,142.

spindle, whereupon the knob may be either unscrewed or pulled olf.

As a means of concealing the inner parts ofthe knob, such as the screw and key and preventing tampering with the same, a disk 12 is screwed intothe outer end of the knob by a special tool 13 for the purpose. If de sired, this disk 12 may be adapted to receive an ordinary screw-driver, in which event it has a straight or cross-shaped slot 14 in the outer. end as shown in Fig. 5.

In this way, a very simple arrangement is provided for assembling the parts of a doorknob, and for fastening them rigidly together and doing away with the ordinary old-fashioned methods of attachment, which wear out, and are continually getting out of order. The present construction is just as inexpensive, and as simple, and is much more effectual in the performance of the work intended for the knob.

I claim: Y

1. An article of the character described including a spindle having a groove formed therein, said groove beingzextended to form an inclined keyway,..a door knob fitted over the spindle, and a key having an inclined guide formed thereon to lit and slide in the keyway for causing a fastening action between the door knob and the spindle.

2. An article of the character described including a spindle having a groove `formed therein, said groove being extended to form an inclined keyway, a door knob fitted over the spindle and having a groove therein, and

a key having an inclined guide formed there-Y on to fit and slide inthe keyway for causing the key to be moved into the groove in the door knob to fasten the door knob and spindle together. y

3. An article of the character described including a spindle having'threads formed on the edges thereof, said spindle having a groove formed therein, said groove being extended to form an inclined keyway, a door knob having the hub thereof fitted over thev spindle and provided with grooves to receive the edges of the spindle, said hub having the surface thereof threaded to receive the threads formed on the spindle, and a key ttedinto the grooves in the s indle and hub and having an inclined guide orlned thereon to fit and slide in the keyway for causing the key to engage the surface of the groove in the hub to fasten the door knob and spindle together.

4. An article of the character described includingra spindle having the edges thereof threaded, said spindle having a groove formed therein, said groove provided with an inclined key-way, a 'door knob Vhaving the hub'thereof fitted over the spindle and-in ternally threaded to receive the threaded edges of the spindle, said hub having a groove formed therein, and a key tted into thetgroovev in the spindle andhaving an i11- clined guide formed-thereon to lit and slide in the key-'way for causing the' key to engage the groove in the hub to fasten the door knob and spindle together.

5. AAn article of the character described including a spindle having a relatively narrow groove formed therein, a. slightly larger keyway formed in the spindle and communicating with the groove, a door knob associated with the spindle, and a flattened key received in the groove and havingan inclined guide formed thereon to fit and slide in the keyway forcausing a fastening action between the door knob and spindle.

6. An article of the character described including a spindleY having a groove formed therein, and a communicating keyway of dierent cross-sectional contour, a door knob associated with fthe spindle, and a key slidably fitted into the groove, and having a guide connected therewith to it and slide in the keyway for causing a fastening action .be-p

' tween the door knob and spindle.

In testimony whereof I affix my signature.

HARRY vL.4 EVANS. 

